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"""Helpers for working with PDF types."""
from typing import List, Union
try:
# Python 3.8+: https://peps.python.org/pep-0586
from typing import Literal # type: ignore[attr-defined]
except ImportError:
from typing_extensions import Literal # type: ignore[misc]
try:
# Python 3.10+: https://www.python.org/dev/peps/pep-0484/
from typing import TypeAlias # type: ignore[attr-defined]
except ImportError:
from typing_extensions import TypeAlias
from .generic._base import NameObject, NullObject, NumberObject
from .generic._data_structures import ArrayObject, Destination
from .generic._outline import OutlineItem
BorderArrayType: TypeAlias = List[Union[NameObject, NumberObject, ArrayObject]]
OutlineItemType: TypeAlias = Union[OutlineItem, Destination]
FitType: TypeAlias = Literal[
"/Fit", "/XYZ", "/FitH", "/FitV", "/FitR", "/FitB", "/FitBH", "/FitBV"
]
# Those go with the FitType: They specify values for the fit
ZoomArgType: TypeAlias = Union[NumberObject, NullObject, float]
ZoomArgsType: TypeAlias = List[ZoomArgType]
# Recursive types like the following are not yet supported by mypy:
# OutlineType = List[Union[Destination, "OutlineType"]]
# See https://github.com/python/mypy/issues/731
# Hence use this for the moment:
OutlineType = List[Union[Destination, List[Union[Destination, List[Destination]]]]]
LayoutType: TypeAlias = Literal[
"/NoLayout",
"/SinglePage",
"/OneColumn",
"/TwoColumnLeft",
"/TwoColumnRight",
"/TwoPageLeft",
"/TwoPageRight",
]
PagemodeType: TypeAlias = Literal[
"/UseNone",
"/UseOutlines",
"/UseThumbs",
"/FullScreen",
"/UseOC",
"/UseAttachments",
]
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